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http://www.google.com/patents/US156388?utm_source=gb-gplus-share
Patent US156388 - IMPROVEMENT IN PIANO-FORTE ATTACHMENTS
IMPROVEMENT IN PIANO-FORTE ATTACHMENTS
ALBERT STEINWAY
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Patent number
: 156388
Filing date
: Oct 15, 1874
Issue date
: Oct 27, 1874
Inventor
:
ALBERT STEINWAY
Current U.S. Classification
:
84/218
;
84/237
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